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Updated: Aug 19, 2025

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Published on: July 11, 2025
Disorder-dominated quantum criticality in moiré bilayers
Yuting Tan1, Pak Ki Henry Tsang2, Vladimir Dobrosavljević3
1Department of Physics and National High Magnetic Field Laboratory, Florida State University, Tallahassee, FL, 32306, USA. ytan@magnet.fsu.edu.
Moiré bilayer materials exhibit metal-insulator transitions (MITs) driven by disorder, not just strong correlations. A new model explains these transitions and their quantum criticality observed in experiments.
Area of Science:
- Condensed Matter Physics
- Materials Science
Background:
- Moiré bilayer materials show correlated insulating states.
- Metal-insulator transitions (MITs) are observed in these materials.
Purpose of the Study:
- To investigate MITs in Moiré bilayer materials away from strongly correlated regimes.
- To develop a theoretical model for disorder-dominated MITs and quantum criticality.
Main Methods:
- Experimental observation of MITs in Moiré bilayer devices.
- Development of a minimal theoretical model incorporating interactions and disorder.
Main Results:
- MITs in Moiré materials share similarities with disorder-dominated transitions.
- The proposed model captures universal aspects of quantum criticality.
Conclusions:
- Disorder plays a crucial role in MITs in Moiré bilayer materials.
- The theoretical model provides a unified explanation for observed phenomena.
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